Improvemement in saw-filing machines



n. s. BREWER. Saw-Filing Machins.

l Patented fan. 20, 1874-.'

- 'ITED STATES PATENT OFFICE.A

MICHAEL S. BREWER, OF PHELPS COUNTY, MISSOURI.

IMPROVEMEMENT IN SAW-FILING MACHINES.

Specication forming part of Letters Patent No. 146,645, dated January Q0, 1874; application filed June 27, 1873.

To all whom it may concern:

Be it known that I, MICHAEL S. BREWER, of Phelps county and State of Missouri, have invented certain new and useful Improvements in Hand-Saw Filers, of which the following is a specification:

My improved filer is adapted for tiling hand or straight saws, and in which either a bevel or straight lile may be used. The features of novelty in the device consist, iirst, of the combination in a saw-filer, of the hand-hold with a file-holder and a pressure-stem inclosed by said hand-hold for joint operation in giving both horizontal and vertical motion to the ile; second, in the combination of a filing device having a feed movement over and upon the saw, of a glass bearing surface for the saw-teeth to prevent the latter from being dulled by the feed of the device thereon; third, of a fileholder with its branches lit-ted within guides in a horizontal slide, so as to move vertically therein, in combination with a pivoted waybar, Within an opening in which the slide and file-holder are arranged for vertical and horizontal action fourtln'ofa feeding-pawl, in com bination with an inclosed vertical stem and the frame which carries the pawl, arranged for efl'ectin g the feed of `the frame automatically by force applied to the vertical pressure-stem to straighten. the pawl against the saw-teeth .and force back the carrying-frame; iifth, in the combination of the adjustable thumb device, with a stop and handle of the file-holder, for limiting the controllable filing pressure and render the teeth of uniform depth 3 and, finally, of the device for varying the feed of the ler over the saw, according to the coarseness of the teeth, and supporting it in position to be operated by a thumlihnob.

In the accompanying drawings, Figure l represents a perspective elevation of a saw-filer embodying my invention; Fig. 2, a similar view of the fileholder and its slide with the file depressed to its limit; Fig. 3, a plan of a portion of the pivoted way-bar for the fileholder slide; and Fig. 4, a crosssection of the holding and carrying trough-frame.

The saw to be iiled is iirst secured in a clamp such as usedby carpenters, and it is then clamped in a vice with the toothed portion of the saw exposed for the free action of the filer.

The filing device proper is mounted upon a carrying-frame, A, in form like an inverted trough with one side, A', made adjustable with respect to the other by adjusting-screws B B passing through arms b b, by which the side A is suspended; and this trough is placed upon the saw-teeth and adjusted sufficiently loose by' the screws B B to allow it to be moved along freely over the teeth during the operation ot' tiling. A glass luider surface, G, ofthe frame A forms a smooth bearing for the saw-teeth, and prevents their dulling in moving the ler over and upon their points. .A metallic way or guide bar, D, for the iile-holder is pivoted lat q upon the top of the frame A, the pivot being in the middle of its length and atone side, and the open ways or guides are formed by the two sides D D', to receive and admit of the reciprocating movement of a grooved slide, E, which carries the Ele-holder crosswise over the saw. The le-holder is an angular bar, F, with the file Z secured to its end branches Fl F2 in the direction of its length, and a screw-stem, f, rising from its middle horizontal port-ion F, and inclosed by a handle, G, of thel slide E, for a purpose presently described. The slide and file-holder are connected so that the latter will' havel a vertical movement by the branches F1 F2 interlocking with guide-openings c in the ends of the slide E, and the bar F moving in a vertical mortise, g, in the handle G. The screw-stem f extends vertically through an opening in this i handle, and is provided with an adjustable thumb-plate, G', by which the distance of the filer below the slide E is regulated for the proper depth to file the teeth, the end g of the handle serving as a stop to limit the depression of this thumb-piece, for the purpose `as shown in Fig. 2. In operating the slide, the

handle G is grasped by the right .hand with the thumb pressing down the stem-knob G', and as each tooth is finished thethumb-knob is released from pressure, and an interiorspiral spring, H, which constantly presses upward upon the thumb-piece, raises the ile Z above the teeth to allow a feeder, L, to move the filer to the next tooth to be filed, the file receiving simultaneously with its reciprocating movement a vertical pressure by the thumb upon the saw-tooth until the gaged depth of tooth is obtained. `The le Z is secured to its holder F by an angular socket-receiver, I, into which the rile-point is inserted and held from turning. The socket piece I is cylindrical, and passes through an eye, i, in the end of the branch F1, to allow the le to be adjusted to give the proper bevel to the teeth, and held at such set77 by a screw, J, passing through the eye i against the socket-piece, which is held in. the eye by a collarhj, which may begaged to determine the bevel for the teeth. The riletail 7a is inserted in an arm, K, iitted upon the horizontal branch F2 of the holder F, and on whichY it is adjusted andV clamped by a screw, k, to bind the point of the ile in its socket. The way or guide bar D has a graded are on the side opposite its pivot q for adjustment in 'connection with a iixed point, p, and a clamping thumb-screw, I), to hold the way-bar as it may be adjusted upon its pivot obliquely to the frame A at the points R R to give the correct set for a cutoff saw, as shown in Fig. 3,

or at the center line S ofthe scale, to bring the way-bar at right angles to the frame A, -to give a proper set for a rip-saw. Thetrough-frame is recessed below the way-bar to admit of the proper action ofthe iile upon the saw, and the said way-bar is a sufficient distance above the teeth to allow the iile to be raised clear of them in feeding the iiler thereover. This feeding movement takes place after each tooth is iiled by means of a pawl-feeder, L, arranged in the line ofthe trough so as to act upon the saw-teeth7 and pivoted to a screw-stem, L', passing through an inelosing-handle, W, 011 the frame A, and provided with an adjustable thumb-knob, M, a spring, m, for constantly pressing it outward, and a stop-screw, N, to regulate the distance of the movement of the pawl L, to feed correctly and according to the coarseness of the saw-teeth.

Y The feed is made by pressing with the left hand upon the knob M, and, as the acting end of the pawl rests upon and abuts against teeth, it will, when its stem Ll is depressed, push the filer along over and upon the saw-teeth a distance of one tooth, and so on until all the teeth are iiled, the stop-screw N serving to gage the stroke of the pawl by increasing or diminishing the Vertical movement of its stem to suit tine or coarse teeth. In this wa,Y all the teeth are sharpened by a device which is moved bodily over the saw-teeth by the pressure of one hand, while the operation of ling is earried on by the other.

I claiml. The hand-hold G provided with the slot g, in combination with the vertically-adjustable file-holder F and the pressure-stem G', inclosed by said hand-hold for joint operation, substantially as described.

2. The combination, with a saw-iling device having a feed movement over and upon the points of the teeth, of a glass bearing-sun face, G, for the purpose described.

3. The file-holder F iitted within guides in the slide E for movement vertically therein, in combination with the pivoted open way-bar D D', between which the slide E and the fileholder F are arranged for operation, as de scribed.

4. The pawl L, in combination with the stem Ll M and the frame A, whereby the feed of said frame is effected automatically by force applied to the pressure-stem M to straighten the pawl and force back theframe, as described.

5. The thumb device G, in combination with the stop g and the handle G of the rile-holder, as and for the purpose described.

6. The pressure thumb knob IVI and the gage-stop N, in combination with the feedingpawl L, as and for the purpose set forth.

MICHAEL S. BREWER. Vitnesses:

D. B. R. DIcKINsoN, HENRY FORT. 

